G_playerSuitArmorModeHealthRegenTimeMoving = 0
Add the following line to the end of the file and save it:
Open the file (using Notepad) of the difficulty level you are currently playing or wish to edit. The four files you're looking for are titled (for example: C:\Program Files\Electronic Arts \Crytek \Crysis Warhead \Game \Config). Head to the difficulty files in your Crysis folder :\Program Files\Electronic Arts\Crysis Warhead\Game\Config